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| n | a(n) |
|---|---|
| 0 | 6 |
| 1 | 78 |
| 2 | 4654 |
| 3 | 312390 |
| 4 | 21167510 |
| 5 | 1435594238 |
| 6 | 97371674686 |
| 7 | 6604463476598 |
| 8 | 447963730184230 |
| 9 | 30384227802426030 |
| 10 | 2060884053792801614 |
| 11 | 139784466963241906598 |
| 12 | 9481221017869954060214 |
| 13 | 643086846082033986242142 |
| 14 | 43618927438218948551328606 |
| 15 | 2958559706907951258983758550 |
[6,78,4654,312390,21167510,1435594238,97371674686, 6604463476598,447963730184230,30384227802426030, 2060884053792801614,139784466963241906598, 9481221017869954060214,643086846082033986242142, 43618927438218948551328606, 2958559706907951258983758550] |